雾件（已做广告但尚未上市的计算机程序或产品）a piece of software or other computer product that has been advertised but is not available to buy yet, either because it is only an idea or because it is still being written or designed
un.
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【计算机】空中楼阁件〔指已经广为宣传但实际上并未供应市场的所谓电脑新产品〕
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newsoftwarethathasbeenannouncedoradvertisedbuthasnotyetbeen, andmayneverbe, produced